A 125-foot Big R Pedestrian Bridge was recently installed as part of an intermodal project in Montgomery, AL, connecting a new intermodal facility's parking deck to the downtown Riverwalk area via a five-level observation tower. On installation day, the 52,700-pound bridge required not only a crane, but also a bit of extra patience. Workers had to wait on three trains to pass before the train traffic could be stopped long enough for the bridge to be lifted and carefully eased into place. Stopping train traffic, even briefly, is a significant problem on tracks that see about 70 trains on a typical day. Fortunately, Big R Bridges install quickly and easily with minimal traffic disruption.
But, unforeseen delays can be a fact of life in construction. When the overall project first started in 2007, work was delayed when crews found massive rocks underground that were 20 to 40 feet in diameter. Officials believe that the rocks were placed there in 19th century to keep the Alabama River from eroding the shoreline. Additional time was required to drive foundation pilings as deep as 70' into the ground.
After unforeseen delays, the speedy bridge installation was much appreciated
The Bowstring Truss bridge was shipped in two sections and installed with minimal interruption to the train traffic. Due to the reach required to set the bridge a 500-ton crane was used to set the bridge. The 7'8"-wide bridge has a concrete deck and is painted brown with our three-paint system. We also installed four conduits under the bridge and an extensive conduit system inside the truss for an elaborate light system which included linear LED lights and light fixtures. The entire project, including the construction of the parking deck and bus station, cost $17 million. The construction of the tower, including the bridge, was $3.7 million of that.
Contractor: Stalling & Sons, Inc.